Product Description
TF80SC TF81SC Oversized Secondary Pressure Regulator Valve Kit
Also fits Volvo AM6, Opel (AF40), SAAB (AF40/6), Ford (AF21), Mazda (AW6A-EL)
Sonnax Part Number: 39741-11K
TOOLING REQUIRED
- F-39741-TL11
- VB-FIX
A worn secondary pressure regulator valve in a TF-80SC or TF-81SC transmission can result in compromised converter/lube circuit pressure resulting in overheated fluid, bushings and torque converter. Driveability issues include harsh Reverse, TCC slip and codes, and poor shift quality. The Sonnax oversized secondary pressure regulator valve kit 39741-11K is designed to correct the pressure outputs from the valve and restore hydraulic integrity of the SLT circuit.
- Hardcoat anodized aluminum valve combats premature wear
- Annular grooves have been added to the valve for better centering in the bore
- The highly wear-resistant Sonnax sleeves provides over 80% more support than the OE casting
- A new spring is included to allow proper calibration
PACKAGE CONTAINS
- Valve
- Sleeve
- Spring
- Plug Use with TF-81SC Only
SYMPTOMS
- TCC codes
- TCC slip
- TCC surge
- Loss of lube oil
- Overheated fluid, bushings & converter
- Poor shift quality
- Harsh Reverse
CAUSE
Bore wear at the spring end of the valve allows the SLT circuit and regulated converter pressure to cross leak. Bore wear at the balance end of the valve reduces converter and lube flow.
CORRECTION
Sonnax oversized secondary pressure regulator valve kit allows the hydraulic integrity of the bore to be restored after reaming. With the improved materials and valve support, the service life can be extended beyond the OE casting.
Product Videos
Custom Field
Requires Tooling? Yes
